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China's steel production capacity of more than 1 billion tons/year, steel production process by-product a large number of blast furnace gas, converter gas and coke oven gas, by-product gas contains carbon monoxide, hydrogen and methane gas. Carbon-one chemical industry is a production process in which a carbon atom compound (carbon monoxide, methane, etc.) is used as raw material to convert and synthesize chemical products, especially the modern coal chemical industry with synthesis gas (carbon monoxide and hydrogen) as the basic raw material is the most typical. The purification of carbon monoxide and hydrogen from steel by-product gas is directly used in carbon-one chemical industry, which not only improves the utilization value of steel gas, but also reduces the production cost of chemical synthesis. The steel co-production takes the by-product gas of the steel industry as the source, and the chemical products of the chemical industry, such as methanol, ethanol, ethylene glycol, etc. as the terminal, breaking through the limitations of the industry, comprehensive overall consideration, and building a bridge between steel and chemical industry is one of the effective ways for the steel industry to achieve the "double carbon goal.
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Oxygen-enriched/full-oxygen combustion
Oxygen-enriched combustion is a high-efficiency enhanced combustion technology using oxygen-enriched air with an oxygen volume content of more than 21% as a combustion-supporting gas. Oxygen-enriched combustion can significantly improve combustion efficiency and flame temperature, reduce the ignition point of fuel, accelerate the combustion reaction speed, and then save primary energy; oxygen-enriched combustion can promote complete combustion, reduce the amount of flue gas after combustion, improve heat utilization, and reduce excess Air coefficient, reduce the generation of harmful substances, is conducive to carbon dioxide capture. With the progress of combustion technology and the reduction of oxygen cost, oxygen-enriched combustion technology has been more and more widely used in iron and steel smelting, non-ferrous smelting, industrial furnace, thermal engineering, environmental protection and other fields.
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Low Carbon Utilization of Iron and Steel Gas
Blast furnace gas and converter gas are the main secondary energy sources for long-process iron and steel enterprises. The CO and CO₂ contained in blast furnace gas account for about 50% of the total volume, and the CO and CO in converter gas account for about 70% of the total volume. Improving the utilization efficiency of CO in coal gas and capturing CO₂ is one of the important ways to reduce carbon emissions in iron and steel enterprises.
The CO in the gas is enriched and injected back into the blast furnace, thereby saving the amount of coke and coal in the blast furnace smelting process, which is the most efficient way to use CO in the gas and the most suitable for steel enterprises.
The CO₂ in the gas is captured by means of low power consumption and low cost for carbon sequestration, oil displacement, steel slag mineralization, chemical synthesis, etc., which can help steel enterprises to perfectly realize the last "kilometer" of carbon reduction ".
For regions and enterprises with high calorific value gas demand and high natural gas purchase price, by enriching CO in blast furnace gas, 1800kcal ~ 2400kcal high calorific value gas can be obtained to replace natural gas, which not only saves high natural gas purchase costs, but also reduces the total carbon emissions of steel enterprises.
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Ozone is a strong oxidizing gas, which is widely used in water treatment, flue gas denitrification and other fields. Ozone is lively in nature and difficult to store and transport, so ozone is generally produced on site by an ozone generator. China's ozone generator market size of more than 5 billion yuan, of which water treatment applications accounted for about 55%, flue gas denitrification applications accounted for about 9%, medical and health and food industries and other fields accounted for about 36%. Ozone preparation is based on oxygen as raw material, the utilization rate of raw material oxygen is only 8-10wt%, which means that more than 90wt% of oxygen is not converted into ozone, but exists in the product gas in the form of carrier gas, resulting in the cost of oxygen accounting for more than 55% of the cost of ozone production. How to improve the utilization rate of oxygen is the key to saving energy and reducing the cost of ozone. The self-developed "ozone adsorbent" and supporting process equipment can recover the oxygen that is not involved in the conversion and return it to the inlet of the ozone generator again. By recycling the oxygen, the oxygen consumption in the ozone production process can be reduced, thereby improving the utilization rate of oxygen and achieving the purpose of saving energy and reducing the cost of ozone.
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The production and operation of pressure swing adsorption oxygen generation equipment has strong particularity and professionalism. By adopting the pressure swing adsorption oxygen generation (VPSA) equipment leasing mode, important but non-core pressure swing adsorption oxygen generation business functions can be transferred to professional gas companies for full responsibility, enabling enterprises to concentrate capital, manpower and technical resources on their core businesses or main businesses with competitive advantages. Users and gas producers both focus on their main businesses and enhance the core competitiveness of users through professional work.
In the face of China's massive large, medium and small industrial users, as well as the gradual popularization of the sharing economy model, the pressure swing adsorption oxygen (VPSA) equipment leasing model has broad growth prospects. As a leading enterprise in the field of PSA oxygen production, it has the integrated advantage of "R & D-production-operation" and has strong strength. Through the leasing service of advanced oxygen production equipment, it will help China's industrial manufacturing to transform and upgrade to intelligent manufacturing. There is a lot to be done in the field of equipment leasing.
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